// Copyright (c) Microsoft. All rights reserved. Licensed under the MIT license. See LICENSE in the project root for license information.

//
// Office UI Fabric
// --------------------------------------------------
// Nav Bar styles


// On small screens, the nav bar contains only the hamburger icon.
.ms-NavBar {
  .ms-font-m;
  .ms-u-normalize;
  background-color: @ms-color-neutralLighter;
  height: 40px;
  padding: 0 10px;
  width: 100%;
  outline: 1px solid transparent;

  .ms-Overlay {
    display: block;
    opacity: 0;
    pointer-events: none;
    transition: opacity @ms-duration3 @ms-ease1;
    z-index: @ms-zIndex-back;
  }
}

// The button to open the menu on small screens.
.ms-NavBar-openMenu {
  font-size: 20px;
  height: 40px;
  line-height: 40px;
  position: absolute;
  right: 27px;
  text-align: center;
  width: 40px;
  cursor: pointer;
}

// Hide the items by default.
.ms-NavBar-items {
  display: none;
}

// Individual item/button, with optional subitems.
.ms-NavBar-item {
  .ms-u-borderBox;
  display: block;
  height: 40px;
  line-height: 40px;
  font-family: @ms-font-family-semilight;
  font-size: @ms-font-size-l;
  padding-left: 20px;
  position: relative;

  &:hover {
    cursor: pointer;
    background-color: @ms-color-themeLighter;
    color: @ms-color-black;

    .ms-Icon {
      color: @ms-color-neutralPrimary;
    }
  }

  &:active {
    color: @ms-color-themePrimary;
  }

  // The currently-selected item.
  &.is-selected {
    font-family: @ms-font-family-semibold;
  }

  // Items can be disabled.
  &.is-disabled {
    color: @ms-color-neutralTertiary;

    &:hover {
      cursor: default;
      border: none;
    }
  }
}

.ms-NavBar-link {
  color: @ms-color-neutralPrimary;
  text-decoration: none;

  &:active {
    color: @ms-color-themePrimary;
  }
}


// Items can contain subitems.
.ms-NavBar-item.ms-NavBar-item--hasMenu {

  // Hide submenus by default.
  .ms-NavBar-items {
    display: none;
  }

  &:hover {
    &:after {
      color: @ms-color-neutralDark;
    }
  }
}

// Add chevron icon.
.ms-NavBar-chevronDown {
  color: @ms-color-neutralSecondary;
  font-size: 22px;
  position: absolute;
  top: 10px;
  right: 20px;
}

// Search.
.ms-NavBar-item.ms-NavBar-item--search {
  position: relative;
  width: 30px;

  // Search icon.
  &:after {
    .ms-Icon;
    color: @ms-color-neutralSecondary;
    content: '\e039';
    font-size: 21px;
    line-height: 40px;
    position: absolute;
    right: 5px;
    top: 0;
  }

  // The search box is hidden by default.
  .ms-TextField {
    display: none;
  }

  // Opened state.
  &.is-open {
    width: 200px;
    padding-right: 40px;
    border: none;

    .ms-TextField {
      display: block;
    }

    .ms-TextField-field {
      border: none;
      background-color: transparent;
    }
  }
}

// Show the nav items menu only on small screens
@media (max-width: @ms-screen-sm-max) {
  // State: The navigation panel is open.
  .ms-NavBar.is-open {
    // Show the items.
    .ms-NavBar-items {
      .drop-shadow;
      background-color: @ms-color-white;
      bottom: 0;
      display: block;
      left: 50px;
      margin: 0;
      padding: 0;
      position: absolute;
      right: 0;
      top: 0;
      outline: 1px solid transparent;
      z-index: @ms-zIndex-middle;
    }
  }
}

// On small screens, override the contextual menu styles.
@media (min-width: @ms-screen-sm-min) and (max-width: @ms-screen-sm-max) {

  .ms-NavBar-item.ms-NavBar-item--hasMenu.is-selected {
    height: inherit;
    background-color: transparent;
    font-family: @ms-font-family-semilight;

    // Flip the chevron around.
    .ms-NavBar-chevronDown {
      transform: scaleY(-1);
    }
  }

  .ms-NavBar-item .ms-ContextualMenu {
    position: static;
    border: none;
    box-shadow: none;
    width: auto;

    .ms-ContextualMenu-link {
      font-family: @ms-font-family-semilight;
      font-size: @ms-font-size-l;
    }
  }

  // When the navbar is opened, animate to full opacity
  // and activate pointer events so can be clicked.
  .ms-NavBar.is-open .ms-Overlay {
    display: block;
    cursor: pointer;
    opacity: 1;
    pointer-events: auto;
  }
}

// On medium screens and larger we display the menu items in the nav bar.
@media (min-width: @ms-screen-md-min) {

  // We don't need the button to open the menu.
  .ms-NavBar-openMenu {
    display: none;
  }

  // Show the items list.
  .ms-NavBar-items {
    display: block;
    list-style: none;
    margin: 0 7px 0 0;
    padding: 0;
  }
  
  .ms-NavBar-chevronDown {
    top: 3px;
    right: 0;
    float: none;
    position: relative;
  }

  // Position the items in a horizontal list.
  .ms-NavBar-item {
    float: left;
    margin-right: 20px;
    font-size: @ms-font-size-m;
    padding: 0;

    &:hover {
      border-bottom: 2px solid @ms-color-themePrimary;
      background-color: transparent;
    }

    // The currently-selected item.
    &.is-selected {
      font-family: @ms-font-family-semibold;
      border-bottom: 2px solid @ms-color-themePrimary;
    }
  }

  // Modifier: Items can contain subitems.
  .ms-NavBar-item.ms-NavBar-item--hasMenu {
    // Add chevron icon.
    &:after {
      position: relative;
      top: 3px;
      padding-top: 0;
      right: auto;
    }
  }

  // Modifier: Items can be positioned to the right on larger screens.
  .ms-NavBar-item.ms-NavBar-item--right {
    float: right;
    margin: 0 0 0 20px;
  }
}
